diff --git a/helper.py b/helper.py
index 859a0994..fe56b42d 100755
--- a/helper.py
+++ b/helper.py
@@ -93,7 +93,8 @@ include $(RACK_DIR)/plugin.mk
 		f.write(makefile)
 
 	# Create plugin.hpp
-	plugin_hpp = """#include <rack.hpp>
+	plugin_hpp = """#pragma once
+#include <rack.hpp>
 
 
 using namespace rack;